CN211230411U

CN211230411U - Adjustable flow water injector is opened with hydraulic pressure in oil field

Info

Publication number: CN211230411U
Application number: CN202021261327.1U
Authority: CN
Inventors: 彭威; 李友良; 封旭; 崔晶; 王祖江; 安源; 宋丽娟; 崔志强
Original assignee: Dongying Kaibo Petroleum Technology Co ltd
Current assignee: Dongying Kaibo Petroleum Technology Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2020-08-11
Anticipated expiration: 2030-07-02

Abstract

A hydraulic opening adjustable flow water injector for oil fields is characterized in that a lower joint is connected with an oil pipe; the lower joint and the central pipe are sealed by a sealing ring; a rotary core pressure spring is arranged between the lower connector and the rotary core; the fixed core and the valve are rigidly sealed; the material is stainless steel; a valve pressure spring is arranged between the valve and the upper joint; and the upper joint and the central pipe are sealed by a sealing ring. The rotary core is provided with a rotary core valve plate, the rotary core body is of a cylindrical structure, and the rotary core body is provided with a through slot hole as a rotary core water outlet hole. The advantages are that: the packer is hydraulically opened while being set by a ground pump truck, no additional power is needed, and the opening cost of manual mechanical equipment is reduced; the structure is simple, the flow area of the water outlet hole is adjusted by utilizing the rotary core valve plate, and the flow adjusting range is large and accurate; the water injector is free of flowing dead zones, and is made of stainless steel, so that the valve core is not easy to block and corrode, and the service life is longer.

Description

Adjustable flow water injector is opened with hydraulic pressure in oil field

Technical Field

The utility model relates to an oil field water injection technical field, more specifically the adjustable flow water injector is opened with hydraulic pressure in oil field that says so.

Background

After the oil field is put into operation, along with the increase of the exploitation time, the energy of an oil layer is continuously consumed, so that the pressure of the oil layer is reduced, meanwhile, the viscosity of underground crude oil is increased due to the fact that the underground crude oil is greatly degassed, the yield of an oil well is reduced, even the production is stopped, and finally the recovery ratio of the oil layer is greatly reduced. In order to compensate for the loss of underground substances and energy caused by the production of crude oil, maintain or improve the pressure of an oil layer, realize high and stable yield of an oil field and finally realize higher recovery ratio, an effective method is to inject water into the oil field in the production process, namely, a water injection well is used for injecting water into the oil layer so as to supplement and maintain the pressure of the oil layer. The water injection flow of the oil well is controlled by a water injection regulator arranged in a water injection pipe. At present, a water injector used for water injection in domestic oil fields is manually opened by mechanical equipment, so that labor and time are wasted, and the local block sewage is injected, because acidity or water mineralization is high in a medium, on one hand, a valve core part of a gate valve is easy to rust, on the other hand, a sealing surface is easy to abrade, so that the sealing is not tight, leakage and other adverse conditions are caused, so that the adjustment is not only laborious, but also the valve core is easy to block and clamp, the closing is not tight, the service life is very short, the water injection belongs to a high-pressure dangerous environment, and the high failure rate of the gate valve is very unsafe for field operators.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adjustable flow water injector is opened with hydraulic pressure in oil field can save artifical mechanical equipment and open the cost, simple structure, and is corrosion-resistant, and factor of safety is high.

The utility model adopts the technical proposal that: a hydraulic opening flow-adjustable water injector for oil fields comprises an upper connector, a fixing pin, a sealing ring, a central pipe, a well washing sleeve, a valve pressure spring, a valve, a fixing core, a rotating core pressure spring and a lower connector; the method is characterized in that: the lower joint is connected with the oil pipe; the lower joint and the central pipe are sealed by a sealing ring; a rotary core pressure spring is arranged between the lower connector and the rotary core; the fixed core and the valve are rigidly sealed; the material is stainless steel; a valve pressure spring is arranged between the valve and the upper joint; and the upper joint and the central pipe are sealed by a sealing ring.

The rotary core is provided with a rotary core valve plate, the rotary core body is of a cylindrical structure, and the rotary core body is provided with a through slot hole as a rotary core water outlet hole. The fixing core is provided with a through hole as a water outlet hole of the fixing core. The well washing sleeve is of a cylindrical structure, and a through hole is formed in the diameter direction of the well washing sleeve and is a water injection hole.

Compared with the prior art, the utility model has the advantages that: the packer is hydraulically opened while being set by a ground pump truck, no additional power is needed, and the opening cost of manual mechanical equipment is reduced; the structure is simple, the flow area of the water outlet hole is adjusted by utilizing the rotary core valve plate, and the flow adjusting range is large and accurate; the water injector is free of flowing dead zones, and is made of stainless steel, so that the valve core is not easy to block and corrode, and the service life is longer.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure of the rotary core of the present invention.

Fig. 3 is a schematic view of the rotary core valve plate of the present invention.

Fig. 4 is a schematic view of the water outlet hole of the rotary core of the present invention.

Reference numerals:

1. an upper joint; 2. fixing the pin; 3. a seal ring; 4. a seal ring; 5. a central tube; 6. washing the well sleeve; 7. a valve pressure spring; 8. a seal ring; 9. a valve; 10. fixing the core; 11. a seal ring; 12. a sealing ring 13 and a rotary core; 14. a seal ring; 15. rotating the core compression spring; 16. a lower joint; 17. a water injection annulus channel; 18. fixing a core water outlet; 19. rotating the core annulus channel; 20. a water injection hole; 21. rotating the core valve plate; 22. rotating the core body; 23. and rotating the core to form a water outlet.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1: the utility model provides an adjustable flow water injector is opened with hydraulic pressure in oil field, includes top connection 1, fixed pin 2, sealing washer 3, sealing washer 4, center tube 5, well washing cover 6, valve pressure spring 7, sealing washer 8, valve 9, fixed core 10, sealing washer 11, sealing washer 12, rotatory core 13, sealing washer 14, rotatory core pressure spring 15, lower clutch 16. The lower joint 16 is connected with an oil pipe; the lower joint 16 and the fixed core 10 are sealed by a sealing ring 14; a rotary core pressure spring 15 is arranged between the lower connector 16 and the rotary core 13; the fixed core 10 and the valve 9 are sealed rigidly; a valve pressure spring 7 is arranged between the valve 9 and the upper joint 1; the upper joint 1 and the central pipe 5 are sealed by a sealing ring 3; the upper joint 1 and the well washing sleeve 6 are sealed by a sealing ring 4; a channel formed by the central tube 5 and the fixed core 10 is a water injection annular channel 17; a channel formed by the rotary core 13 and the lower joint 16 is a rotary core annular channel 19; four through holes are uniformly arranged on the well washing sleeve 6 along the circumference as water injection holes 20.

As shown in fig. 2-4: the rotary core 13 includes a rotary core body 22 and a rotary core valve sheet 21. 4 rotary core valve plates 21 are uniformly arranged at the inlet of the rotary core 13 along the circumference; the rotary core body 22 is uniformly provided with 6 through slot holes which are water outlet holes 23 of the rotary core.

Water enters the water injector through the central pipe 5, then enters the rotary core 13, enters the rotary core annular channel 19 through the rotary core water outlet hole 23, and enters the water injection annular channel 17 through the fixed core water outlet hole 18. The flow area of the fixed core water outlet hole 18 can be controlled by adjusting the relative position of the rotary core valve plate 21 and the fixed core water outlet hole 18, so that the water flow entering the water injection annular channel 17 is adjusted. When the water pressure in the water injection annular channel 17 exceeds 0.5MPa, the valve pressure spring 7 is compressed and deformed, the valve 9 is opened, and water flows out of the water injector through the water injection hole 20 and enters an oil layer. When water injection is stopped or the water outlet hole 18 of the fixed core is closed, the pressure of the annular space is reduced, the compression deformation of the valve pressure spring 7 is recovered, the valve 9 is closed, and the water injection is stopped.

The hydraulic open type valve is combined with the through-flow area adjustable orifice plate to be used for adjusting the water injection flow of the water injection well, and compared with a high-pressure control valve used for conventional water injection, the hydraulic open type valve is simple in structure and high in reliability; the flow regulation range is large and accurate; the water injector has no flow dead zone inside, the valve core is not easy to block and corrode, and the service life is prolonged greatly.

Claims

1. A hydraulic opening flow-adjustable water injector for oil fields comprises an upper connector, a fixing pin, a sealing ring, a central pipe, a well washing sleeve, a valve pressure spring, a valve, a fixing core, a rotating core pressure spring and a lower connector; the method is characterized in that: the lower joint is connected with the oil pipe; the lower joint and the central pipe are sealed by a sealing ring; a rotary core pressure spring is arranged between the lower connector and the rotary core; the rotating core and the valve are rigidly sealed; the material is stainless steel; a valve pressure spring is arranged between the valve and the upper joint; and the upper joint and the central pipe are sealed by a sealing ring.

2. The oilfield hydraulic-start adjustable-flow injector according to claim 1, wherein the adjustable-flow injector comprises: the rotary core is provided with a valve plate, the rotary core body is of a cylindrical structure, and the rotary core body is provided with a through slot hole as a rotary core water outlet hole.

3. The oilfield hydraulic-start adjustable-flow injector according to claim 1, wherein the adjustable-flow injector comprises: the well washing sleeve is of a cylindrical structure, and a through hole is formed in the diameter direction of the well washing sleeve and is a water injection hole.